*See the Completeness sheet in excel spreadsheet indecies for Summary Report of GIS and Spreadsheet count statistics: Spreadsheet Count does not include voids and is an estimate only, since there may be records missing from the spreadsheet. Also, due to unresolved duplicates in the spreadsheet, estimates may be based on page counts, assuming one record per page. The % in GIS is also an estimate only. Some books are not complete in GIS, including, but not limited to books 12–14, 16-24, 100-109, 130-139, 161-169 and 172-174. Better Completeness After is the date from which the completeness improves. For more information, please see the Completeness Report and Use Constraints in the metadata, as well as the the Disclaimer for the Surveyor Information System.

**Official Maps: At this time there is no GIS data for Official Maps, please use the
Discontinued Index for researching this book type.

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